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Cheers guys, thanks for all your advice.

Gary, thanks. One last question and I know this might be a how long is a piece of string question. But how many times do you think it will take to get the system clean?

Okay fair point we're always more careful when we do it for ourselves... but still no one has answered the question. Is it liable to damage my boiler, should I be concerned?

Yes I can well believe that. But no one has really answered the question. Putting aside the manufacturers guarantee. By cleaning the system this way, i.e. putting cleaning fluid in after the boiler is up and running. Is it liable to cause problems to the boiler or is it a tried and...

Good point Spacethegas. As I say it really comes down to the effect on the boiler. If doing it this way isn't going to have a detrimental effect on the boiler then no I wouldn't pay the extra. If I thought it was going to harm the boiler, then yes quite possibly I would have.[/u]

He was recommended, and to be honest if it's not going to ruin the boiler then I'm happy. However, I'm not sure time constraints can be a good excuse for not doing it the right way. I have been paying him on a daily rate and the system wasn't cheap.

Well when the system was drained down the water was pretty black. He said that when he returns he will fill in all the log books, guarantee cards etc. If he adds the cleaning fluid and then returns to drain down and refill will this be okay or should I pull him up on it. The boiler...

I've just had an Vaillant Ecotec637 and Megaflow fitted to an old central heating system(about ten/fifteen years old). The boiler is up and running, but the installer hasn't yet flushed the system out. He said he would pop back in a few days to add cleaning fluid, leave it for a few days then...

Cheers for the info. I suppose UFH is all about personal preference. But it was a company that supplied devimat who said you can use 150W on wood, if it's laid over thermal board? I kind of figured 18mm would be too thin. Just wondered if I did go the thermal board route whether that...

Great thanks for that, and the link. I kind of figured the WPB/ PVA suggestion was probably not a good one As a matter on interest. I'm replacing the floor, which is presently old floorboards on joists (mixture of rotten and split) with WPB. I am tiling the floor and want to include...

I'm renovating an old Victorian property, as part of this I am refitting a new bathroom which will have wet room type shower in one corner and large format tiles on the walls approx 30x40cm. The present walls are finished with the original wet type plaster about 3/4 inch think, while not the...

I'm renovating an old Victorian property, as part of this I am refitting a new bathroom which will have wet room type shower in one corner and large format tiles on the walls approx 30x40cm. The present walls are finished with the original wet type plaster about 3/4 inch think, while not the...